QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

14km N of Big Bend, CA

· 8.6 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 44 kmSiskiyou County 73 kmModoc County 110 kmTrinity County 116 kmTehama County 116 kmLassen County 117 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.7 (md)
Depth
8.6 km below the surface
Felt
no reports yet
Nearest
Shasta County, 44 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1811 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 41.1423, -121.8963. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 44 km (27 mi) NNE of here earthquakes near Shasta County
Siskiyou County, CA 73 km (45 mi) SE of here earthquakes near Siskiyou County
Modoc County, CA 110 km (69 mi) WSW of here earthquakes near Modoc County
Trinity County, CA 116 km (72 mi) ENE of here earthquakes near Trinity County
Tehama County, CA 116 km (72 mi) NNE of here earthquakes near Tehama County
Lassen County, CA 117 km (73 mi) WNW of here earthquakes near Lassen County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

38 earthquakes have been recorded within 50 km since this one.

  1. 1.7 12km SSW of Tennant, CA
  2. 1.8 4km N of McCloud, CA
  3. 1.7 24km N of Shasta Lake, CA
  4. 1.7 27km N of Shasta Lake, CA
  5. 1.9 13km N of McCloud, CA
  6. 2.8 11km N of McArthur, CA
  7. 1.7 23km N of Shasta Lake, CA
  8. 1.8 16km W of Round Mountain, CA
  9. 1.5 12km W of Round Mountain, CA
  10. 2.1 14km E of Big Bend, CA
  11. 1.9 8km SSE of Tennant, CA
  12. 1.6 10km WNW of Montgomery Creek, CA
  13. 1.7 13km W of Round Mountain, CA
  14. 1.9 4km NNE of McCloud, CA
  15. 2.2 4km NNE of McCloud, CA

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.